Dustlike fuel



Patented Feb. 2, 192 6.

Fnrnnmon wILnnLm Bunions; or sonvnsnone, swnnnnt' nus'rmxn N0 Drawing.

To all whom'z't may concern Be it known that'I, FRIEDRICH WILHELM BnANDEs, a citizen of Sweden, and a resident of Solvesborg, Sweden, have invented certain new and useful Improvements in Dustlike"Fuel;(for which I have filed ap plication in Germany, May 9, 1923, Serial No.- 109,624), of*which the following is a specification."

This invention relates ,tof'dus't. like fuel, has 'beenffound l desirable in some instances. a "to add from .52 -to8%jof adhesive substancei to cause-the bri'quette to have-the above i '70 fmeansof the transportation and the various and it is intended 'to both improve the manufacture of th'islarticleas' wen" as to convert" suitable kindsof' fuel' intoa statein which it may safely be shipped to great distances in the powderous or' dust-like condition and may be readily disintegrated substantially without loss at the place of consumption, and may be safelyand' reliably fed into the furnace or fire-place, whil-eat the same time substantially 'eliminatingto a minimum the dangers heretofore occurring of back-firing, explosion, and blowing out of the flame. My

invention among these and other important uses and advantages is also intended to materially reduce the'co'sts of transportation of such material and to simplify its mode of application, andin consequence thereof to also render the "construction of dust fed furnaces and fire-places less complicated. Besides, in-

asmuch as for the fuelof the kind referred to the question of transportation is of great commercial importance, the employment of such fuel becoming impracticalby the comparato dry and to disintegrate different kinds of fuel suitable for use in dust-fed fireplaces and the like, and, on the other hand, it has been known to produce bricks or briquettes from dust-like coal or coal In'accoi'dance with my invention the manufacture of such fuelbricks is carried out in'such a manner'that the bricksbreeze.

obtained from the dried and disintegrated comminuted fuel have only such a degree of coherence and solidity imparted to them as to 'enable'then1"'to., be sufliciently resisting duringtransportatiomwhile at the same time I being readily disintegrated at the place of Application filed m a, 1924. Serial no. 72a,s4o.- I

tmsuslptibn. This' time by a. suitable selection of thetemperature, and possibly a of the'bitumen orradhesive if added,so. that i the agglutinating iaction of the bitumen is utilized only to such a degree, as will be necessary only "for the preservation of the shape I of the brick during transportation," .v the state ofcoherence of the particles of. the

gag'ement of its mechanical mol'eculessi It i qualities-fiwhen *pressed' into shape; By'

operations and handlings' during? shipment I I the texture of-thefbricks "is naturally somewhat deceased, without, however, causing "them to becomeentirely' disintegrated.

'At the place of consumption the bricks' or other pieces of mouldings obtained from dust, thus for instance, by means of a beater mill, anedg-e runner or the like, preferably constructed so as toop'erat'e as a blower, ventilator'or the like, and'by this means the dust obtained may bemixed with air, and

may be direotly fed as dust like fuel into the furnace or fireplace. In case a grate-fireplace is provided in combination with the dust fed fire placefor the purpose of ignit- J ing the dust fl'ame,' the i grate maybe fed with the solid bricks, while the dust-fed fire place will befs ippliedwith the brushed or disintegrated bricks or 'pieces of mould-f in g.

It is to be understood that the p-resent in v ven tion is; not restricted "to the particular: 1 7

mode of executionmentioned byway-of exemplification, and various means of proce 1 dure and forms of apparatus may naturally be employed, "according to v'ariuos condi tions of application {without deviating from i "the spiritof the invention as herein set forth in the appended cl im 1 J 17 i 1. Them'e'thod of prepari mali fiafi:

temporarily forming the comminut'ed coal in the burnenf agglomeratedcoal for tran portation and subsequent use in a I pulverized fuelburner, which comprises comminutlng said coal,

agglomerated coal for transportation and 7 plying heat and pressure to t e comminuted 7 coal to form it into temporary briquettes fi'for transportation, and subsequentl comminuting the briquettes for use in the urner;

3. The method of reparing naturally unagglomerated coal or transportation and subsequent use in a pulverized fuel burner,

which comprises oomminuting and drying the. coal, temporarily forming the comm1- nuted and dried coal into briquettes for transportation, and subsequently recomminuting the briquettes for use in the burner.

FRIEDRICH WILHQ BRANDES- 

